int x,a;
a=10
x=&a;
cout<<*x; //using dereference operator
this will print value 10
the other case is
int *x; //x is a pointer variable
int a=10;
x=&a;
cout<<*x; //printing value 10
what is the difference between these two cases?
11  4637  sa************* @gmail.com wrote:
int x,a;
a=10
x=&a;
cout<<*x; //using dereference operator
this will print value 10
the other case is
int *x; //x is a pointer variable
int a=10;
x=&a;
cout<<*x; //printing value 10
what is the difference between these two cases?
1. Don't post multiple times. We heard you the first time.
2. Try a C++ newsgroup. C is a different language than what you posted
here. sa************* @gmail.com wrote:
int x,a;
a=10
x=&a;
this is an error you can't store a pointer value in an int.
Didn't your compiler complain?
cout<<*x; //using dereference operator
this isn't C
this will print value 10
no it won't
the other case is
int *x; //x is a pointer variable
int a=10;
x=&a;
cout<<*x; //printing value 10
what is the difference between these two cases?
one gives a diagnostic the other doesn't
--
Nick Keighley
Dan Pop: "When was the last time you've implemented a real life
application as a strictly conforming program?"
Richard Heathfield: "About 20 minutes ago. It was a new, heavily
optimised pig-launching routine, which gets us a 70% range increase
on previous porcine aeronautic programs." sa************* @gmail.com wrote:
>
int x,a;
a=10
x=&a;
cout<<*x; //using dereference operator
this will print value 10
the other case is
int *x; //x is a pointer variable
int a=10;
x=&a;
cout<<*x; //printing value 10
what is the difference between these two cases?
Don't post the same article more than once.
Both are undefined. cout is undeclared. Even if it was, left
shifting it by 10 and discarding the result is meaningless.
Assigning an address to an int is also undefined. Executable code
outside of a function body is not allowed.
Maybe you are thinking of some other language than C? C++ comes to
mind, and questions about it are better aimed at comp.lang.c++.
--
Chuck F (cbfalconer at maineline dot net)
Available for consulting/temporary embedded and systems.
<http://cbfalconer.home .att.net>
--
Posted via a free Usenet account from http://www.teranews.com
The "deference operator" does not exist in C, and is rarely used in
comp.lang.c.
It does exist in INTERCAL, where it is one of the most useful features
of the language. Of course, since that language is INTERCAL, that's
not saying much.
HTH. HAND.
--
Michael Wojcik mi************@ microfocus.com
I said, 'I need to put my soul into my work and it is well known that
computers haven't got a soul.' My father said, 'The Americans are working
on it.' -- Sue Townsend, _The Secret Diary of Adrian Mole, Aged 13 3/4_
In article <11************ **********@k70g 2000cwa.googleg roups.com>,
Nick Keighley <ni************ ******@hotmail. comwrote:
>sa************ *@gmail.com wrote:
>int x,a;
a=10
x=&a;
this is an error you can't store a pointer value in an int.
Didn't your compiler complain?
>cout<<*x; //using dereference operator
this isn't C
Actually, it can be legal C.
My program contains this declaration:
int cout, *x = &cout;
Without such a declaration, I would assume that OP's program, like most
of those posted here, wouldn't compile.
Kenny McCormack posted:
My program contains this declaration:
int cout, *x = &cout;
Yes, that is a declaration, although it would be better described as a
"definition ", because it actually creates an object(s).
--
Frederick Gotham
Frederick Gotham wrote:
Kenny McCormack posted:
My program contains this declaration:
int cout, *x = &cout;
Yes, that is a declaration, although it would be better described as a
"definition ", because it actually creates an object(s).
It is a definition of x, but (at least in C99) it is only a definition
of cout if it has block scope. "Declaratio n" is correct no matter where
it is placed.
=?utf-8?B?SGFyYWxkIHZ hbiBExLNr?= posted:
int cout, *x = &cout;
Yes, that is a declaration, although it would be better described as a
"definition" , because it actually creates an object(s).
It is a definition of x, but (at least in C99) it is only a definition
of cout if it has block scope. "Declaratio n" is correct no matter where
it is placed.
I don't understand, please elaborate on that. My current understanding is
that the following is _always_ a definition, regardless of where it's places:
int cout;
The only way that it could be a declaration is if it were:
extern int cout;
--
Frederick Gotham
Frederick Gotham said:
=?utf-8?B?SGFyYWxkIHZ hbiBExLNr?= posted:
> int cout, *x = &cout;
Yes, that is a declaration, although it would be better described as a
"definition ", because it actually creates an object(s).
It is a definition of x, but (at least in C99) it is only a definition
of cout if it has block scope. "Declaratio n" is correct no matter where
it is placed.
I don't understand, please elaborate on that. My current understanding is
that the following is _always_ a definition, regardless of where it's
places:
int cout;
That's only a tentative definition, not a "proper" definition, unless it's
within a function.
The only way that it could be a declaration
All definitions are declarations, by definition, but I declare that not all
declarations are definitions.
--
Richard Heathfield
"Usenet is a strange place" - dmr 29/7/1999 http://www.cpax.org.uk
email: rjh at above domain (but drop the www, obviously) This thread has been closed and replies have been disabled. Please start a new discussion. Similar topics | |
by: Steven T. Hatton |
last post by:
This is something I've been looking at because it is central to a currently
broken part of the KDevelop new application wizard. I'm not complaining
about it being broken, It's a CVS images. Such things happen. The whole
subsystem is going through radical changes. I don't really want to say
what I think of the code just yet. That would influence the opinions of
others, and I really want to know how other people view these things,...
|
by: RS |
last post by:
Hi,
What is the difference between new() and malloc()?
RS
|
by: diadia |
last post by:
string s = "hello";
const char *p = s.begin();
cout << p << endl; // print hello
s = "";
char *p2= s.begin();
cout << p2 << endl; // print hello why?????
|
by: J Wang |
last post by:
dear,
I debug the program recently as follows.
#include <sys/stat.h>
int main(int argc, char *argv)
{
struct stat buf;
|
by: Romeo Colacitti |
last post by:
Hi,
Does anyone here have a strong understanding for the meanings of the
terms "lvalue" and "rvalue" as it pertains to C, objects, and different
contexts? If so please share.
I've been reading several old posts/threads on the subject, and they
never end with a conclusion (people keep correcting each other and
disagreeing).
| | |
by: rahul8143 |
last post by:
hello,
what is difference between sizeof("abcd") and strlen("abcd")? why
both functions gives different output when applied to same string
"abcd".
I tried following example for that.
#include <stdio.h>
#include <string.h>
void main()
{
char *str1="abcd";
|
by: satyspiceoflife |
last post by:
int x,a;
a=10
x=&a;
cout<<*x; //using dereference operator
this will print value 10
the other case is
int *x; //x is a pointer variable
int a=10;
x=&a;
|
by: Vols |
last post by:
class A{
public:
int x;
};
class B : public A{
public:
int y;
};
void foo()
|
by: Ahmad Humayun |
last post by:
Whats the difference between:
char str1 = "wxyz";
char* str2 = "abcd";
I can do this:
str2 = str1
but I can't do this:
str1 = str2
|
by: marktang |
last post by:
ONU (Optical Network Unit) is one of the key components for providing high-speed Internet services. Its primary function is to act as an endpoint device located at the user's premises. However, people are often confused as to whether an ONU can Work As a Router. In this blog post, we’ll explore What is ONU, What Is Router, ONU & Router’s main usage, and What is the difference between ONU and Router. Let’s take a closer look !
Part I. Meaning of...
|
by: Hystou |
last post by:
Most computers default to English, but sometimes we require a different language, especially when relocating. Forgot to request a specific language before your computer shipped? No problem! You can effortlessly switch the default language on Windows 10 without reinstalling. I'll walk you through it.
First, let's disable language synchronization. With a Microsoft account, language settings sync across devices. To prevent any complications,...
| | |
by: Oralloy |
last post by:
Hello folks,
I am unable to find appropriate documentation on the type promotion of bit-fields when using the generalised comparison operator "<=>".
The problem is that using the GNU compilers, it seems that the internal comparison operator "<=>" tries to promote arguments from unsigned to signed.
This is as boiled down as I can make it.
Here is my compilation command:
g++-12 -std=c++20 -Wnarrowing bit_field.cpp
Here is the code in...
|
by: Hystou |
last post by:
Overview:
Windows 11 and 10 have less user interface control over operating system update behaviour than previous versions of Windows. In Windows 11 and 10, there is no way to turn off the Windows Update option using the Control Panel or Settings app; it automatically checks for updates and installs any it finds, whether you like it or not. For most users, this new feature is actually very convenient. If you want to control the update process,...
|
by: agi2029 |
last post by:
Let's talk about the concept of autonomous AI software engineers and no-code agents. These AIs are designed to manage the entire lifecycle of a software development project—planning, coding, testing, and deployment—without human intervention. Imagine an AI that can take a project description, break it down, write the code, debug it, and then launch it, all on its own....
Now, this would greatly impact the work of software developers. The idea...
|
by: conductexam |
last post by:
I have .net C# application in which I am extracting data from word file and save it in database particularly. To store word all data as it is I am converting the whole word file firstly in HTML and then checking html paragraph one by one.
At the time of converting from word file to html my equations which are in the word document file was convert into image.
Globals.ThisAddIn.Application.ActiveDocument.Select();...
|
by: adsilva |
last post by:
A Windows Forms form does not have the event Unload, like VB6. What one acts like?
|
by: 6302768590 |
last post by:
Hai team
i want code for transfer the data from one system to another through IP address by using C# our system has to for every 5mins then we have to update the data what the data is updated we have to send another system
| | |
by: muto222 |
last post by:
How can i add a mobile payment intergratation into php mysql website.
| |
